Apologize for the delay.
I don't own a copyright of this, Stanford Online Archive does. However, I don't think some hard consequences woul follow if use of 20 sec of this *educational* material would happen.
I have more of it contact me at mail[at]
aleksas.ru if you need it, they all grabbed from Stanford Bucky Archive which is available at their sight for streaming only. And they ultimately, I think own the copyright for it.
Live Music Archive
Librivox Free Audio
Metropolitan Museum
Cleveland Museum of Art
Internet Arcade
Console Living Room
Books to Borrow
Open Library
TV News
Understanding 9/11